Heel-trimming machine



(No Model.) Q 2 Sheets-Sheet 2.

A, MCDOWELL.

HEEL TRIMMING MACHINE. No. 392,875. Patented Nov. 13, 1888.

Winaww. JFZW/Z i 07:

NITE rATEs tries.

HEEL-TRIMMING MACHINE.

SPECIFICATION forming part of Letters Patent No. 392,875, dated November 13, 1888..

Application filed August 22, 1888.

To all whom it may concern:

Be it known that I, ALEXANDER McDow- ELL, a citizen of the United States, residing at Lynn, in the county of Essex and State of Massachusetts, have invented certa'in'new and useful Improvements in Heel-Trimming Machines; and I do hereby declare the following to be a full, clear, and exact description of the inventiomsuoh as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention relates to improvements in heel-trimming machines, particularly that class in which a heel-trimming knife is caused to cut or shape an ogee-heel automatically.

My improvements consist in several mechanical devices by which the knife is adjusted with respect to the pattern and the heel to be trimmed, as well as in the arrangement of in termediary mechanism by which the tilting or rocking motion'of the knife-stock and knife can be altered with respect to the heel,saidrocking motion being caused by a stationary actuating form-plate; further,in the mode of springmounting the knife-stock,by which a yielding movement thereof permits the knife to yield likewise in the direction of the heel and prevents said knife beiug drawn from its normal path as it moves in the material of the heel.

My invention likewise consists in the construction of the knife-stock,whioh is split longitudinally to enable it to be adjusted and allow it to contract upon the base of the knife to compensate for the wear produced by the rocking motion of the latter therein.

Several other features of adjustment will be hereinafter described.

The drawings represent in Figure 1 a plan of that portion of a heeLtrimming machine which embodies my invention. Fig. 2 is a rear view. Fig. 3 is a side view in direction of arrow 1 in Fig. 1. Fig. 4 is a section on line was in Fig. 2,whileFig. 5 isasection on line 11y.

In the drawings,to'which reference may be had,I show the following instrumentalities now employed in heel-trimming machines of the class above premised: The stationary form or pattern plate is shown at 2, by which rocking of the knife-stock is produced in order to Serial No. 283,467. (No model.)

change the angle of the knife with respect to the heel at different points. The trimming-lever is at 3 and the heel support or pattern at 4, while the turn-table plate is indicated at 5. The latter is grooved at 6 6 to receive the head or Standard 7, the horizontal portion or base of which rests and slides upon the turn-table 5. Said head is spring-actuated by means of a tubular hub, 8, rigidly affixed to the rear of the turn-table, and is adapted to receive a tubular sleeve, 10, with a headed or enlarged portion,12. Said sleeve is screw-threaded exteriorly to engage an adj usting-nut, l3,which bears against the hub 8. Interiorly said sleeve is also screw-threaded to engage a shaft or rod, 14, firmly fixed in the standard 7 and Screwthreaded exteriorly. Within the hub 8, and coiled about the sleeve 10 iS a spring, 15. The latter is confined between the head 12 of the sleeve and the rear end of the hub 8. A checkscrew, 16, holds the nut 13 as a fixture upon the sleeve 10, and by this means said sleeve can be rotated and the rod 14 can be controlled to change the position of the standard 7,which is actuated to cause the knife to approach or to be withdrawn in a radial direction from the axis of the heel-support 4. Release of the nut 13 permits the latter to turn upon the sleeve, which, by aid of the head 12, controls the tension of the spring 15. The important feature in this adjustment is readily seen from the fact that the standard and its operatingpartsthe bearing-block, knifestoek, and knife-can be adjusted without altering the tension of the spring 15. In other words, the pressure of the knife against the heel can be varied as desired regardless of the position of the head or standard.

Above the actuating screw-rod l4 and transversely of the standard 7 is a flanged sleeve, 17, eccentrically bored, and more fully shown and described in Letters Patent No. 304,838, issued to myself September 9, 1884. Semirotation of this sleeve is prevented by cutting the standard at 47 and inserting the set-screw 18, which clamps it in place. WVithin said eccentric-sleeve is located a journal, 19, which serves as the axial support for the bearingblock 20, from which it projects rearwardly. This bearing -block is vertically disposed against the front side of the standard and is provided with longitudinal ribs above and be low, which engage corresponding grooves cut in the knife-stock 21. Furthermore, I have formed a screw-threaded hole, 23, in the end of the journal 19 to receive a screw, '24-in the present instance inclosed within a sleeve, 25. The latter may, however, be omitted. About the latter is coiled a spring, 26, which bears against a washer, 27, resting upon the journal as a point of support. Said washer is contrally bored of a diameter sufficient to permit the sleeve 25 to play therethrough, or when said sleeve is not employed to be of such size as to prevent passage of the spring. In either instance the fixed point of said spring is against the washer. Thus a yielding movement of the knife-stock and knife is effected, and the latter is permitted to advance in the direction of the heel should occasion require.

The knifestock 21 is mounted upon the bear ing-block and has lateral adjustment thereon by means of the screw 28. The knife is shown at 29 removabl y secured to a segmental base, 30, ilangedlaterally to engage curved grooves, in the stock. To compensate for the wear incident to the swinging motion of the knife, I have vertically slotted at 31 or otherwise separated the forward portions of the knife-stock to permit of their being drawn together. This in the present instance is effected by means of a transverse adj usting-serew, 32. Thus, if the knife-base 30 becomes loose, the screw is operated to bring the grooves in the sides of the knife-stock nearer together, and thus easily compensates for the wear in this part of the machine.

To actuate the beari rig-block, the knife-stock, and the trimming-knife thereon to cause the upper end of the knife to lead or incline forward in the direction of the movement of the said knife, a crank-pin, 34, at one end of the bearing-block is connected with a rocker-link arm, 35. The lower end of this arm is furnished with a roller,36, which travels upon the pattern-plate 2, before mentioned. The opposite end of the bearing-block is furnished with a lug or stop, 37, adapted to contact against a regulating-screw, 38, in the standard. A spring, 39, about the crank-pin and sleeve-journal 16 serves to maintain the foot of the rocker-link arm upon the pattern-plate 2. To compensate for wear of the roller upon the pattern-plate, as likewise to provide means for making the rocker-arm 35 longer or shorter, as occasion may require, I have combined the following parts: A pivotal tubular support, 40, is removabiy secured in the base of the turn-table plate 5 (see Fig. 5) by an annular groove, 41, and retainingscrew 42. Within this support plays the rocker-arm, which is compound and consists of a lower piece, 43, furnished at one end (the bottom) with a roller. The other end is tubular andinteriorly screwthreaded. The upper part, 45, is provided with an annular head,within which is fitted a sleeve, 46, bored eccentrically to receive the crank-pin 34, while its lower end is screwthreaded to enter thepart 43. This sleeve 46 is secured within the head of the rocker'arm by a set-screw. This adjustment is required, since the rocker-arm must be changed in length to compensate for the change in elevation of the bearing-plate, movement of the latter be ing produced by the cccentrically-mounted journal-pivot.

\Vhat I desire to claim is- 1. In aheel-trimming machine, the combination, with a kuife-stock movable about an axis at right angles, or thereabout, with the Y axis of the heel, its knife adapted to turn as the knife-stock is rocked, and the bearingblock,of the movable standard and its springadjusting mechanism,composed of a fixed hub, within said hub a tubular sleeve, a'movablyfixed nut engaging the exterior of said sleeve, a screw-rod aiiixed to the standard and movable within said sleeve, and a spring coiled about the sleeve and confined within the hub, substantially as stated.

2. In a heel-trimming machine, the combination, with a spring-actuated standard, of a rocking knife-stock adapted to carry a knife, which turns as the knife-stock rocks, and the bearing-plate with its spring-actuating mech anism, as set forth, by which a yielding movement of the knife is permitted in direction of the heel in process, substantially as set forth.

3. In a heel-trimming machine, a spring actuated standard, an adjustable sleeve transversely therein, having an eccentric bore, a knife, and a knife-stock mounted upon a rocking bearing-plate, combined with said bearing-plate having apivotaljournal in said sleeve and the mechanism which spring actuates said bearing-plate, consisting of a screw, 24, adjustable in said journal, asleeve, 25, which incloses said screw, a spring, 26, coiled about the sleeve, and a loose washer, 27, through which the sleeve moves, substantially as described.

4. In a heel-trimming machine, a knife,29, and actuating mechanism therefor, in combination with the knife-stock 2l,which is slotted at 31, and a transversely-arranged screw, 32, fordrawing together the parts of said stock at the sides of said slot, substantially as set forth.

5. In a heel-trimming machine, a springactuated standard, a spring-actuated bearingplate journaled thereon, a knife-stock upon said plate, a knife, and a fixed pattern-plate adapted to tilt said knife-stoclgcombined with the pivotally-mounted rocker-arm adjustable lengthwise, whereby the fixed pattern plate controls the tilting movement of the knife, substantially as herein specified.

6. A rocking knife-stock, a knife movable thereon in planes at right angles to the movement of the knife-stock, abearing-plate springaetuated to permit yielding movement of the knife in direction of the heel, a fixed patternplate, and the adjustable roeker-arm traveling thereon and adapted to impart rocking mo tion to. the bearing-plate and knife-stock,com bined with the movable standard, its adjustactuated adjustable standard,7, the sleeve 17, having an eccentric bore, the clamping-screw 18, and a bearing-plate mounted in said sleeve, its knife and knife-stock, and the operating mechanism for rocking said bearing-plate, as herein set forth.

In testimony whereof I affix my signature in presence of two witnesses.

ALEXANDER MCDOWELL. Witnesses:

H. E. LODGE, FRANCIS O. STANWOOD. 

